Alkaline Rocks and Carbonatites of the World

Funded by HiTech AlkCarb - New geomodels to explore deeper for Hi-Tech critical raw materials in Alkaline rocks and Carbonatites

Iisorskii

stripes

Occurrence number: 
084-00-049
Country: 
Kazakhstan
Location: 
Longitude: 81.32, Latitude: 48.18

The 7.5 km2 Iisorskii intrusion lies on the northwestern margin of a much larger granitoid massif of the same age. The relationship of the Iisorskii peralkaline granite, which contains riebeckite and annite, to the more extensive granitoids is not clear, but many investigators consider the peralkaline granites to be an alkaline facies generated by alkali metasomatism and zirconium-niobium mineralization.

Economic: 
Zr-Nb mineralization is known in this occurrence.
Age: 
Late Palaeozoic - on geological evidence (Ziryanov, 1964).
References: 
ERMOLOV, P.V., VLADIMIROV, A.G. and TIKHOMIROVA, N.I. 1988. The petrology of silica oversaturated agpaitic alkaline rocks. Nauka, Novosibirsk. 86 pp.ZIRYANOV, V.N. 1964. Nepheline syenites of the middle Prichingiz. Izvestia Akademii Nauk Kazakhstan SSR, Alma-Ata. Seriya Geologicheskaya, 5: 57-67.
Location: 
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith